3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array1 = ["", "", "3", "", "5", "", ""]; $array2 = ["URD", "ISL"]; foreach($array1 as $id => $a1){ //for each item in array 1 if($a1){ //if the array 1 item has a value $array1[$id] = array_shift($array2); //replace it with an item from array 2 } if(empty($array2)){ //if there are no more values left to share in array 2, stop break; } } var_dump($array1);
Output for 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
array(7) { [0]=> string(0) "" [1]=> string(0) "" [2]=> string(3) "URD" [3]=> string(0) "" [4]=> string(3) "ISL" [5]=> string(0) "" [6]=> string(0) "" }
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(7) { [0]=> string(0) "" [1]=> string(0) "" [2]=> string(3) "URD" [3]=> string(0) "" [4]=> string(3) "ISL" [5]=> string(0) "" [6]=> string(0) "" }

preferences:
166.22 ms | 402 KiB | 156 Q